After my Xperia Z3's screen was damaged I had to send it to repairs (an independendent repair provider). I was unable to log out of any accounts and while the phone was away, I noticed that my facebook messages were being read, so I logged out all device remotely by changing the password. When my phone returned however, it had tons of unread notifications - and the clock had been changed. Did the repair service change the time so I wouldn't see that they read my notifications/does changing the time make read notifications go unread again? How can I tell if they have been going through my messages and other data?